Opinion of the European Economic and Social Committee on the "Proposal for a Regulation of the European Parliament and of the Council amending Regulation (EEC) No 1408/71 on the application of social security schemes to employed persons, to self-employed persons and to members of their families moving within the Community and Regulation (EEC) No 574/72 laying down the procedure for implementing Regulation (EEC) No 1408/71" (COM(2003) 468 final — 2003/0184 (COD)).